Chiba, Japan – Philips and Pioneer used the CEATEC Japan show to present new dual-layer recordable DVD disc technologies for the respective, DVD+R and DVD-R formats.
Philips and Verbatim co-developed the new dual-layer recordable disc which will virtually double disc capacity and will not require users to flip the media over while playing.
The technology expands the current 4.7GB disc capacity for single-layer discs to 8.5GB, while retaining playback compatiblity with existing DVD Video players and DVD-ROM drives, the company said.
Days before the show, Pioneer announced in Tokyo that it had developed dual-layer recording technology for its DVD-R format, expanding the capacity for one side of a disc to 8.5GB.
Pioneer said this is 'almost the same performance as that for dual-layer DVD-ROM discs,' and means that the new DVD-R discs supporting this technology can be played back on most existing DVD players.
Pioneer's new technology will allow users to record programs up to about 4 hours in the SP mode, and up to about 12 hours in the EP mode with DVD recorders, the company said.
Philips’ dual-layer disc will enable recordings up to 4 hours in DVD-quality video or 16 hours in VHS quality, the company said. Users will be able to archive up to 8.5GB of computer files.
The Philips and Pioneer dual-layer discs have write-once capability and will require new hardware to make recordings.
Philips said 'the DVD+RW Alliance is setting an aggressive feature and performance roadmap, and the dual-layer DVD+R format book is expected to be ready within this year. Recorders for both the PC and consumer electronics markets are expected to become available during the course of 2004.'
Pioneer did not announce a introduction timetable, but said it intends to propose the technology 'as a new disc format to the DVD Forum after further improvement in performance.'
Pioneer’s dual-layer DVD-R technology uses said to use the dye-recording-film layer method to, realize a 9.34 percent jitter rate with a 17.3 percent reflection rate on the first layer of a disc, and an 8.08 percent jitter rate with a 19.5 percent reflection rate for the second layer.
Philips dual-layer DVD+R system uses two thin embedded organic dye films for data storage separated by a spacer layer. Compatibility has been achieved through the use of a thin silver-alloy as reflector material in the upper layer giving a reflectivity from the layer of at least 18 perent in compliance with the dual-layer DVD-ROM standard, Philips said.